A method for calculating the center position of collimated light

作     者：WU Guo-jun WU Ling-ling CANG Yu-ping HE Jun-hua DONG Wei-bin CHEN Liang-yi 

作者机构：Xi＇an Institute of Optics and Precision Mechanics Chinese Academy of Science Xi ＇an 710119 China 

出 版 物：《Optoelectronics Letters》 (光电子快报（英文版）)

年 卷 期：2008年第4卷第2期

页      面：155-158页

核心收录：

学科分类：0808[工学-电气工程] 080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China (No. 60337030) 

主　　题：计算方法 位势 光学 激光 

摘      要：It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.